Head-motion.



No. 838,982. PATENTED DEC. 18, 1906.

A. GUIONNEAU.

HEAD MOTION.

APPLICATION FILED SEPT. 2.1905.

avwentoz AZeZ Gm o rzizecza,

Witnesses TED STATES PATENT o FIoE.

Specification of Letters Yatent.

Application filed September 2, 1905. Serial No. 276.816.

Patented nee. 18, 1906..

To all whom it may concern.-

Be it known that I, ABEI GUIONNEAU, a' citizen of the UnitedStates,residing at Denver, in the county of Denver and State of Colorado, haveinvented new and useful In: provements in Head-Motions, of which thefollowing is a specification.

The invention relates to an improvement in head-motions designedparticularly for use in connection with concentrating-tables or similardevices, wherein it is essential that a ficiprocating motion be impartedto the ta- The main object of the present invention is the production ofmeans adapted in operation to impart to the table an absolutely uniformacce erated motion during the forward stroke and uniformly-retardedmotion dur-Y ing the return stroke, whereby to materially increase theefficiency and results of the table.

The invention will be described in detail in the following specificationwith particular reference to the accompanying drawings, wherein Figure 1is a view in side elevation. illustrating my improved head-motion asapplied to the table of a concentrator Fig. 2 is a plan view of thesame.

Referring to the drawings, 1 represents the foundation timbersunderlying the whole structure, and 2 the concentrating-table, the endcross-bar 3 of which is connected with the foundation-timbers bysuitable springs 4, as is usual. It is to be understood that thehead-motion of my improvement is designedfor use with anyconcentrating-table an'd that the illustration herewith is intended toshow a table of ordinary construction without regard todetails, as suchforms no mate rial part of the present invention. The headmotion propercomprises a base-plate 5,- suitably supported on. stringers 6, mountedon the fpundatio'ntimbers. Transverselyalined bearings 7 are fixed onthe base-plate and support a main shaft 8, which centrally between thebearings is provided with a fastand-loose pulley 9 and 10 and at one endwith a fly-wheel 11, all of which parts may be of any preferredconstruction. The end of the shaft 0 posite the fly-wheel is providedwith a cran -wheel 12, to the crank-pin 13 of which is fixed an arm 14,projecting toward the table and secured to the crank-pin 15 of a crank16. The crank 16 is mounted on one end of a crank-shaft 17, supported inbearings 18, mounted on the base-plate immedilateral movement.

' ately contiguous the forward end of the table.

The central portion of the shaft, or that portion between the bearings18 is offset to provide a crank 19, to which is movably connected,through the medium of a collar 20, a rod 21, the forward end of whichasses loosely through an opening 22, forme in a bearingplate 23, securedto the cross-bar 3 of the table. The inner or free end of the rod 21 isthreaded to receive the adjusting-nut 24, and the opening in thebearing-plate 23 adjacent the free end of the rod is cut outto form asemispherical depression 25, in which is seated a semisphericalbearing-block 26, centrally cored to permit passage therethrough of therod 21. edly secured to bearings 18, the cross-arm of the frameextending from one bearing to the other andr'being positioned in a planeforward of said bearings-that is, nearer the table 2.

A U-shaped frame 27 is fix- A bearing-plate 28 is secured to thecross-bar 3 of the table in alinement and on the side opposite thebearing-plate23, said plate 28 being formedwith a central opening topermit passage of the rod 21, it being understood that, as usual, theopening for the rod formed from the plates 28, the cross-bar 3 of theta-v ble-frame, and the bearing-plate 23 is of cone shape, with the basethereof next the operating parts of the device, whereby, in coniunctionwith the semispherical bearing-block 26,

the rod 21 is permitted a certain degree of A coil-spring 2 9 encir-,cles the rod 21, hearing at one end against the bearing-frame 27 and atthe opposite end against the bearinglate 28, this spring serving to take,up al lost motion in opera-v tion and materially assist in thereciprocating movement imparted to the table.

In operation revolution of the main shaft 8 will, through the arm 14 andcrank 16 ,impa'rt areciprocating movement to the rod '21, Y

thereby communicating the said movement to the table 2. As the rod isfreely movable through theopening in the tablein one, direction, 1t willbe evident that the spring v29,

which has been put under tension in the forward movement of the rod,will operate to cause the reverse movement of the table, and

in this reverse movement the rod 21-acts to retard the operation.

From the construction described it be noted that by means of the rod 21,in con:

junction with the spring 29, an absolutely uniformly accelerated motionduring thefore wardstroke and a uniformlyeretarded motion against theretarding movement of the rod. As the rod is uniformly driven by thecrank-shaft 19, it follows that the movement of the table will beuniform and that the transfer of the table from one phase of movement tothe other will be practically cushioned by the effect of the spring 29.

The structure described is readily adapted for use with allconcentrating-tables and may be quickly and conveniently connected withthe same without'interfering in the least with the table structure.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent,is'

The combination with a spring-supported concentrating-table including anend crossbar, of a head-motion therefor comprising a base-plate arrangedin advance of the table, a crank-shaft supported on the base-plate, adrive-shaft mounted on the base-plate in advance of the crank-shaft,means connecting the drive-shaft and crank-shaft to rock the latter inthe revolution of the former, a bearing-frame fixedly secured to thecrank-shaft bearing, an operating-rod projecting through ssaesa saidframe and extending in an unbroken length through one of the cross-barsof the table, said rod'being connected at one end with the crank-shaftand being threaded at \the opposite end, a bearing-plate secured to thetable cross-bar to receive the end of the operating-rod, said platebeing formed with a semispherical depression in alinement with theoperating-rod opening therethrough, a

seinispherical block mounted in said depression and formed with anopening to permit the passage of the operatin -rod, a nut engaging thethreaded end oft e rod and bear.-

ing against the block, a wearlate secured to the cross-bar and formedwit an opening to permit passage of the operating-rod, bolts passingthrough the wear-plate, cross-bar,

ABEL GUiONNEAU.

Witnesses:

CHARLEs A. BRADLEY, JoHN H. GALLUP.

